Brush-holder for dynamo-electric machines.



F. HANKER.

BRUSH HOLDERy FOR DYNAMO ELECTRIC MACHINES.

l APPLIGATION'VFILED 00127, 1908. l

1,007,562, 'Patented Oct. 3l, MH.

2 SHEETS-SHEET l.

` F. C. HANKER. BRUSH HOLDER'POR DYNAMO ELECTRIC MACHINES. APPLICATION FILED 0GT.7,190B. 1,007,562, Patented 0013.- 31, 1911` 2 SHEETSSHEET 2.

wnNEssEs: A iNvNToR UNITED sTATEs' PATENT oEEioE.

TREDERIC e. KANKER,

`OF VVVILKINSBURGy PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, T0 WESTINGHOUSE ELECTRIC &\1VIANUFACTURING COMPANY. OF

EAST PITTSBURGH, PENNSYLVANIA,

A CORPORATION 0E PENNSYLVANIA.

BRUSH-HOLDER FOR DYNAMO-ELECTRIC MACHINES.

Specification of Letters Patent.

Patented Oct. 3i, TQM..

Application filed October 7, 1908., Serial No. 456,638.

To all who-m. it 'may concern:

faces of whichl are perpendicular to the axis of the machine.

It has ,been t'ound desirable, in seine cases, to so construct the commutators of 4dynamo electric machines as to produce a plurality of grooves, the plane surfaces of which are adapted to be engaged by suitable contact brushes. The cylindrical surfaces at the bottoms ot' the grooves serve no useful purpose and, consequently, it is desirable to make the grooves as narrow tlicting with the Contact brushes and brush holders, which are necessarily loca-ted in them..

\.ecording to my present invention, I provide an improved brush holder, which may readily be. inserted in a relatively narrow oi'ooi'e and which, at the saine time, is capale of receiving carbon blocksor brushes of the usual size.

My invention is illustrated in the aecompanying drawings lin which- Figure l is an elevation of a portion of a eoinmutator equipped with my improved brush holder, Fig. 2- is a plan view, partially in section, of the matter shown in Fig. l, an d Fig. 3 is an elevation of the brush holder at. right angles to the plane of the carbon brush. Figs. 4f, 5, G and'7 are detail views of a carbon block or brush which is suitable for use in the brush holder illustrated in the other figures.

Referring to the drawings, the niatter illustrated comprises a commutator l having a plurality of annular projections 2 which provide parallel plane Contact surfaces 3. VThe surfaces 8 are engaged by earbon cont-act blocks or brushes il, which are so adjustably supported by a suitable brush possible without conto the supporting bar 6 .wedged lshaped bars or segments 16, the

holder o that they engage "adjacent plane surfaces of the conuuutator in substantially the same radial plane.

The brush holder 5 comprises a longitudinal supporting bar (i, substantially radial arms 7, .which are secured to the bai' (i by bolts 8, brushl guides tland a pair of similar pressure mechanisms l0. 'lhe carbon blocks or brushes 4- are iitted loosely into the brush guides tl and lare forced in opposite direc:

tit)

tions against the contact siu'faces of the commutator by means of the pressure mechanisms. ln order that. thebrushes may engage 'portions of the connnutating surfaces. which are directlyopposite ach other, without interfering with theirl .independent adjust-- nient. they are disposed in parallel planes which tormsuitable angles with the coninnitating surfaces, as shown vin Fig. Z of the ylrawing. v v l i Each of the pressure mechanisms l0 comprises a lspiral Ispring ll, a shaft` l2, which supported in the walls ol a spring-holding box 153, and a pressure linger t-t, the. free end of which is forced into engagement with the outer end ofv the carbon block or brush by reason of the action .of the spring ll. The specific. pressure mechanism here shown may be replaced by any other suitable device y,for creating the desired pressure between the contact. brush and tht` coininutating surface, if desired.

The bar G is provided with toothed surfaces 15, which are engaged by corresponding surfaces on the. a'rni 7. in order that the position of the brush holder proper relative may be adjusted by loosening the clamping bolts S, while, at the same time, the brush holder is etl'ectually prevented from rotating or slipping after it is once fixed in position. l

Referring to Figs. el, 5, and 7 of the drawings, the carbon brush here illustrated varies in thickness from its inner to its outer V yedge in order that the edges of its contact 'faces may lie in radial lines and thus enable the brush to propcrl y cooperate with the surface of the coniniutator, which is built. up of, side surfaces of which .lie in radial planes. The carbon brush is provided with a cap 1f" of sheet copper or other conducting material which is riveted to the top of the brush and is elolnroally oomsoiiol lo lhs lrusll holder @moby moans of Flexi slumlll.

ln @der ao pisvsnt to ila@ pros sum mechanisms "o my llsslng or arcv', .ich may im s plaa al Athe points of conf-acs bet Een the omslxos und lll@ oommullnlof? I .gm-ovidio slelils 19 which me s@ @mail lo las bosl. liv olor mul sxend somo lo. Gloss pyozimy to "olle communi surfaces izo al1- ey me parallel.

It is sono@ gbl@ fllsz struct'ausl modificaons may silos-lool wlhln falls spirit and Recopa of my inv ,nl

ole my inval/luisa:

'v l. A; asesinos l iisg? .l plsu-as o will glo Waals,

Th@ s, commuator msmlso llmm" como@ surfaces, and Musil s l1 'mg pali of brush guides? *allo csnralplms which are psrsll so 'emi-lg. olsz'j @ml inclined will).

:nog s o slds-'bysicls and osso, l'ush guildes, the oenwhich. pm'allol to escl;

nos@ w ninas, of a psi? of comms brushes mounted m said. gmfl'ss snol mamas for mmm@ the mfeense 'liras collemumaos sur- ,omissis A ing parallsl to sach other :mol inclined "with refsz'emce to @the sido Walls of the grooves.

4;. -l .brush holflsf for dynamo electric muchzges having plazos disk commutating sur faces, comprising a, pair of wege shaped bmsh blocks and. means vfor movably supporting said blockssfygitll that" cenlx'al planes parallel lo each o. or and lnolinel Witlxfef surfaces, lmuslxes locatecl in said guides mdmesns foar forcing sold brushes against saidsmfz'slcssx l 7. The combination with s, rotatable com mutator member' having adjacent opposing plane Contact surfaces, of a brush holder having pmallol inslne guides, brushes mounted in said guideszand having; radial commet surfaces und means for holding said lnusllss in oon'baotfelation with the plane commutator sulfaoes,

ln ts'strmnyv whereof., have hei-sunto sulJscl ed my name this 3rd (luy of c., 1908.

. FRBDERC C. HANKER. llltnesses:

LvmGsToNE,' Einmal' EINES. 

